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BlockArea: Finished rotation and mirroring with meta. Implemented example meta handling for vines, stairs and torches.

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git-svn-id: http://mc-server.googlecode.com/svn/trunk@1319 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com
2013-03-26 21:06:12 +00:00
parent b0397f7273
commit 8dc54301a4
6 changed files with 348 additions and 13 deletions
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15
source/Blocks/BlockHandler.h
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@@ -112,6 +112,21 @@ public:
*/
virtual void Check(int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk);
/// Returns the meta for a block after rotating it counter-clockwise from the specified meta. Default: no change
virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) { return a_Meta; }
/// Returns the meta for a block after rotating it clockwise from the specified meta. Default: no change
virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) { return a_Meta; }
/// Returns the meta for a block after mirroring it around the XY plane. Default: no change
virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) { return a_Meta; }
/// Returns the meta for a block after mirroring it around the XZ plane. Default: no change
virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) { return a_Meta; }
/// Returns the meta for a block after mirroring it around the YZ plane. Default: no change
virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) { return a_Meta; }
/// Get the blockhandler for a specific block id
static cBlockHandler * GetBlockHandler(BLOCKTYPE a_BlockType);

71
source/Blocks/BlockStairs.h
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@@ -49,6 +49,77 @@ public:
}
// TODO: step sound
virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
{
// Bits 3 and 4 stay, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x0c);
switch (a_Meta & 0x03)
{
case 0x00: return TopBits | 0x03; // East -> North
case 0x01: return TopBits | 0x02; // West -> South
case 0x02: return TopBits | 0x00; // South -> East
case 0x03: return TopBits | 0x01; // North -> West
}
// Not reachable, but to avoid a compiler warning:
return 0;
}
virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
{
// Bits 3 and 4 stay, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x0c);
switch (a_Meta & 0x03)
{
case 0x00: return TopBits | 0x02; // East -> South
case 0x01: return TopBits | 0x03; // West -> North
case 0x02: return TopBits | 0x01; // South -> West
case 0x03: return TopBits | 0x00; // North -> East
}
// Not reachable, but to avoid a compiler warning:
return 0;
}
virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
{
// Bits 3 and 4 stay, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x0c);
switch (a_Meta & 0x03)
{
case 0x00: return TopBits | 0x00; // East -> East
case 0x01: return TopBits | 0x01; // West -> West
case 0x02: return TopBits | 0x03; // South -> North
case 0x03: return TopBits | 0x02; // North -> South
}
// Not reachable, but to avoid a compiler warning:
return 0;
}
virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override
{
// Toggle bit 3:
return (a_Meta & 0x0b) | ((~a_Meta) & 0x04);
}
virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
{
// Bits 3 and 4 stay, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x0c);
switch (a_Meta & 0x03)
{
case 0x00: return TopBits | 0x01; // East -> West
case 0x01: return TopBits | 0x00; // West -> East
case 0x02: return TopBits | 0x02; // South -> South
case 0x03: return TopBits | 0x03; // North -> North
}
// Not reachable, but to avoid a compiler warning:
return 0;
}
} ;

61
source/Blocks/BlockTorch.h
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@@ -132,6 +132,67 @@ public:
{
return "step.wood";
}
virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
{
// Bit 4 stays, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x08);
switch (a_Meta & 0x07)
{
case 0x01: return TopBits | 0x04; // East -> North
case 0x02: return TopBits | 0x03; // West -> South
case 0x03: return TopBits | 0x01; // South -> East
case 0x04: return TopBits | 0x02; // North -> West
default: return a_Meta; // Floor -> Floor
}
}
virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
{
// Bit 4 stays, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x08);
switch (a_Meta & 0x07)
{
case 0x01: return TopBits | 0x03; // East -> South
case 0x02: return TopBits | 0x04; // West -> North
case 0x03: return TopBits | 0x02; // South -> West
case 0x04: return TopBits | 0x01; // North -> East
default: return a_Meta; // Floor -> Floor
}
}
virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
{
// Bit 4 stays, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x08);
switch (a_Meta & 0x07)
{
case 0x03: return TopBits | 0x04; // South -> North
case 0x04: return TopBits | 0x03; // North -> South
default: return a_Meta; // Keep the rest
}
}
// Mirroring around the XZ plane doesn't make sense for floor torches,
// the others stay the same, so let's keep all the metas the same.
// The base class does tht for us, no need to override MetaMirrorXZ()
virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
{
// Bit 4 stays, the rest is swapped around according to a table:
NIBBLETYPE TopBits = (a_Meta & 0x08);
switch (a_Meta & 0x07)
{
case 0x01: return TopBits | 0x02; // East -> West
case 0x02: return TopBits | 0x01; // West -> East
default: return a_Meta; // Keep the rest
}
}
} ;

28
source/Blocks/BlockVine.h
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@@ -138,10 +138,36 @@ public:
}
bool DoesDropOnUnsuitable(void)
virtual bool DoesDropOnUnsuitable(void) override
{
return false;
}
virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
{
return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f; // Rotate bits to the right
}
virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
{
return ((a_Meta << 1) | (a_Meta >> 3)) & 0x0f; // Rotate bits to the left
}
virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
{
// Bits 2 and 4 stay, bits 1 and 3 swap
return ((a_Meta & 0x0a) | ((a_Meta & 0x01) << 2) | ((a_Meta & 0x04) >> 2));
}
virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
{
// Bits 1 and 3 stay, bits 2 and 4 swap
return ((a_Meta & 0x05) | ((a_Meta & 0x02) << 2) | ((a_Meta & 0x08) >> 2));
}
} ;